[Digikam-users] digikam 4.2.0 : artefacts in previews

[Robert Zeller]

Gilles,

one more information on this issue:
my jpgs are 36 Mpx big. To show the entire photo on my screen a zoom
factor of 18% is used. If I zoom in to 50% or 100% the artifacts
disappear. To me it looks like the problem is caused by the algorithm
that reduces the picture view size to the screen size. I still have a
copy of DK 4.1.0 which does not show this misbehavior. Something must
have been changed between the two versions. Using Gimp I don't get any
artifacts, however the Gnome Image viewer eog also produces the same
kind of artifacts as DK 4.2.0.

I came across one other issue in DK 4.2: When using : settings -->
configure and switching between the different items in the configure
menu, DK responses become extremely slow, and DK is using a lot of CPU
power and it is not possible to cancel the configure window. What is the
guy doing?

Best regards,

Robert


On 08/06/2014 08:42 AM, Robert Zeller wrote:
> Gilles,
>
> the files are too big to be sent by email. Please download the
> screenshot and the original jpg from my web page:
>
> screenshot: www.robert-zeller.org/transfer/DK-4.2.0-artifact-shot.jpg  
> (see the strange pattern in the dome of the mosque and the poor resolution)
>
> original: www.robert-zeller.org/transfer/0012-SR-2014_05_06_170343.jpg 
> (file is about 15 MB)
>
> I don't see this behavior in previous versions of DK
>
> Best regards,
>
> Robert
>
>
>
> On 08/06/2014 12:06 AM, Gilles Caulier wrote:
>> Can you take a shot and share a screenshot ?
>>
>> Problem is not visible here.
>>
>> Also, share some files to test here...
>>
>> Gilles Caulier
>>
>> 2014-08-06 0:00 GMT+02:00 Robert Zeller <robert.zeller at robert-zeller.org>:
>>> Hello,
>>>
>>> I just compiled DK 4.2.0 on openSUSE 13.1 . There were no compilation
>>> problems.
>>> BUT: as compared to DK 4.1.0 I see on some photos a relatively strong
>>> artifact (moirée) on regular structures. Also I have the impression that
>>> the pictures are not loaded in full resolution. These artifacts seem to
>>> disappear when using the image editor. Is there a way to remove the
>>> moiree patterns? or to force DK to load pictures in full resolution?
>>> Best regards,
>>>
>>> Robert
>>>
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